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Enhancement of an impingement heat transfer between turbulent mist jet and flat surface

✍ Scribed by M.A. Pakhomov; V.I. Terekhov

Publisher
Elsevier Science
Year
2010
Tongue
English
Weight
748 KB
Volume
53
Category
Article
ISSN
0017-9310

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✦ Synopsis

The work presents the results of numerical investigation of the flow structure and heat transfer of impact mist jet with low concentration of droplets (M L1 6 1%). The downward gas-droplets jet issued from a pipe and strikes into at a center of the circular target wall. Mathematical model is based in the solution to RANS equations for the two-phase flow in Euler approximation. For the calculation of the fluctuation characteristics of the dispersed phase equations of [35] model were applied. Predictions were performed for the distances between the nozzle and target plate x/(2R) = 1-10 and the initial droplets size (d 1 = 5-100 lm) at the fixed Reynolds number based on the nozzle diameter, Re = 26,600.

Addition of droplets causes significant increase of heat transfer intensity in the vicinity of the jet stagnation point compared with the one-phase air impact jet.

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